code: def _check_weka_version(jar):
      try:
          zf = zipfile.ZipFile(jar)
      except (SystemExit, KeyboardInterrupt):
          raise
      except:
          return None
      try:
          try:
              return zf.read("weka/core/version.txt")
          except KeyError:
              return None
      finally:
          zf.close()
  
imports: import os
  import re
  import subprocess
  import tempfile
  import time
  import zipfile
  from sys import stdin
  from nltk.classify.api import ClassifierI
  from nltk.internals import config_java, java
  from nltk.probability import DictionaryProbDist
label_desc: Use image node_id 2 for calling a global function with example usage: _check_weka_version(jar) and returns: None, zf, None